enum class

I wonder whether you have seen such a "dazzling" bit domain operation,Int READ = 0 Int write = 0 Int connect = 0 The most typical one is the selectionkey in JDK NiO. When you determine an operation that is of interest to selectionkey, you have to

C + + Concept summary (based on c++11)Structure Constructor form: Default constructor Copy constructor Definition: When a new object is defined and initialized with an object of the same type, the copy

The C++11 enumeration type is "Domain" (scoped enum), which has the following advantages over the "non-domain" (unscoped enum) of the C++98 enumeration type:1 namespace pollutionIn general, names that are declared within curly braces are limited by

In all design patterns, Singleton mode is one of the most common design patterns in our project development, and there are many ways to implement the singleton pattern, do you know it? How do you guarantee the thread safety of a singleton mode in

18th. Customizing generics, enumerations, and annotations 18.1 custom genericsGeneric definition: (1) Only generic syntax defined on a method(2) extends and Super keywords to limit the available types of generics(3)? Use of type wildcard

[New Features of Java 5] EnumerationWhat is Enumeration type? If you define a class to complete the employee information of an enterprise, the employee information includes the name, age, and position information (the job has only three roles:

Java enumeration introduction and usage In actual programming, there are often such "datasets", their values are stable in the program, and the elements in the "dataset" are limited. For example, seven data elements from Monday to Sunday constitute

An enum, called enumeration, is a new feature introduced in JDK 1.5 and is housed in a Java.lang package.An enum is a keyword that feels like it is tied to class, interface, and cannot be used with final,abstract because it defaults to the final

1.autoIts function is inferred for the type. Auto is a placeholder for a type that informs the compiler to infer the true type of the declared variable based on the initialization code. It can be used for declaring variables in various scopes.Auto i=

When I recently discussed the issue with my colleagues, my colleague suddenly mentioned why the constant values defined in Java do not take the ENMU enumeration type and are defined by the public final static type. We used to be defined in this way,

Byte Stream and character streamByte stream can handle all types of data (pictures, videos, etc.), the corresponding class in Java is "stream" End 1 bytes = 8 bits binary = The specific storage space character stream can only handle the data of

Simple IntroductionEnum types in Java are defined by the keyword enum, a new type from jdk1.5, and all enum types inherit from the enum type. To understand enumeration types, we recommend that you first open the enum class in the JDK and simply read

Recently doing Android development, need to use the enumeration value, so that can be assigned continuously, I write as before C + +, as follows: Public enum ColorSelect { = 0, green_bage, blue_bage; }Compile but.I

Original URL: http://blog.csdn.net/wgw335363240/article/details/6359614Java enum-type enum useWhen I recently discussed the issue with my colleagues, my colleague suddenly mentioned why the constant values defined in Java do not take the ENMU

Source: Deep analysis of the enumeration types of Java--thread security and serialization issues for enumerations Enumeration is how to ensure thread-safeIf you want to see the source code, you must first have a class, then the enumeration type

Enum class Enum was introduced by JDK1.5, which was preceded by the public static final int Enum_value instead of the enumeration class. Enum class Enum is a special class that inherits the class Java.lang.Enum by default. Like other ordinary

One, the scope is the constant of the classIn some cases, it is useful to make the scope of a symbolic constant a class. For example, a class declaration (not a definition) might use literal 30来 to specify the length of an array, because the

Enum class Enum is introduced by JDK1.5, and is preceded by a public static final int Enum_value instead of an enumeration class. Enum class Enum is a special class that inherits the class Java.lang.Enum by default. As with other ordinary classes,

The previous article has translated the Hashtable source code top annotation, this article will explain in detail Hashtable each method realization. Hashtable Hierarchy Chart Let's look at the definition of Hashtable: public class Hashtable extends

The Mystery of 19.4 values () By deserializing the enumeration class, values () is the static () method added by the compiler. The compiler marks an enumeration class (enum) as the final class, so the enum class cannot be inherited. 19.5